@misc{indiciae86a1331d479a,
  title = {Confounding in epidemiological studies.},
  author = {J N Morris},
  year = {1992},
  doi = {10.1136/bmj.305.6861.1097-a},
  url = {https://pubmed.ncbi.nlm.nih.gov/1467708/},
  note = {Source identifier: 1467708}
}